122 lines
4.3 KiB
C
122 lines
4.3 KiB
C
/*
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* uhub - A tiny ADC p2p connection hub
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* Copyright (C) 2007-2009, Jan Vidar Krey
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef HAVE_UHUB_NETWORK_CONNECTION_H
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#define HAVE_UHUB_NETWORK_CONNECTION_H
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#include "uhub.h"
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#define NET_EVENT_TIMEOUT 0x0001
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#define NET_EVENT_READ 0x0002
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#define NET_EVENT_WRITE 0x0004
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#define NET_EVENT_SOCKERROR 0x1000 /* Socket error, closed */
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#define NET_EVENT_CLOSED 0x2000 /* Socket closed */
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#define NET_EVENT_DESTROYED 0x4000 /* Struct is invalid and can be cleaned up */
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struct net_connection;
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struct net_timer;
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typedef void (*net_connection_cb)(struct net_connection*, int event, void* ptr);
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typedef void (*net_timeout_cb)(struct net_timer*, void* ptr);
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struct net_timer
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{
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unsigned int initialized;
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struct event timeout;
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net_timeout_cb callback;
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void* ptr;
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};
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extern void net_timer_initialize(struct net_timer* timer, net_timeout_cb callback, void* ptr);
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extern void net_timer_reset(struct net_timer* timer, int seconds);
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extern void net_timer_shutdown(struct net_timer* timer);
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struct net_connection
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{
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int sd; /** socket descriptor */
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unsigned int flags; /** Connection flags */
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void* ptr; /** data pointer */
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net_connection_cb callback; /** Callback function */
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struct event event; /** libevent struct for read/write events */
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struct event timeout; /** Used for internal timeout handling */
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time_t last_recv; /** Timestamp for last recv() */
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time_t last_send; /** Timestamp for last send() */
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#ifdef SSL_SUPPORT
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SSL* ssl; /** SSL handle */
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size_t write_len; /** Length of last SSL_write(), only used if flags is NET_WANT_SSL_READ. */
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#endif /* SSL_SUPPORT */
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};
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extern void net_con_initialize(struct net_connection* con, int sd, net_connection_cb callback, const void* ptr, int events);
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extern void net_con_update(struct net_connection* con, int events);
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/**
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* Close the connection.
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* This will ensure a connection is closed properly and will generate a NET_EVENT_DESTROYED event which indicates
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* that the con can safely be deleted (or set to NULL).
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* @returns 1 if the memory can be freed immediately, or 0 if it needs to go through the NET_EVENT_DESTROYED event.
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*/
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extern int net_con_close(struct net_connection* con);
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/**
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* Send data
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*
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* @return returns the number of bytes sent.
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* 0 if no data is sent, and this function should be called again (EWOULDBLOCK/EINTR)
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* <0 if an error occured, the negative number contains the error code.
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*/
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extern ssize_t net_con_send(struct net_connection* con, const void* buf, size_t len);
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/**
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* Receive data
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*
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* @return returns the number of bytes sent.
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* 0 if no data is sent, and this function should be called again (EWOULDBLOCK/EINTR)
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* <0 if an error occured, the negative number contains the error code.
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*/
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extern ssize_t net_con_recv(struct net_connection* con, void* buf, size_t len);
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/**
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* Set timeout for connetion.
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*
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* @param seconds the number of seconds into the future.
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*/
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extern void net_con_set_timeout(struct net_connection* con, int seconds);
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extern void net_con_clear_timeout(struct net_connection* con);
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#ifdef SSL_SUPPORT
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/**
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* Start SSL_accept()
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*/
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extern ssize_t net_con_ssl_accept(struct net_connection*);
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/**
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* Start SSL_connect()
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*/
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extern ssize_t net_con_ssl_connect(struct net_connection*);
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#define NET_CON_SSL_MODE_SERVER 1
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#define NET_CON_SSL_MODE_CLIENT 2
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extern ssize_t net_con_ssl_handshake(struct net_connection* con, int ssl_mode);
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#endif /* SSL_SUPPORT */
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#endif /* HAVE_UHUB_NETWORK_CONNECTION_H */
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